Insider Transactions Reported by 24 Insiders of PREFORMED LINE PRODUCTS CO

Symbol: PLPC on Nasdaq
Location: Cleveland, OH

Quick Takeaways

PLPC - PREFORMED LINE PRODUCTS CO has 24 insiders with reported activity on this page.
No net insider buy/sell flow is currently reported for the last year.
Recent transaction rows are available for direct filing-level review.

What Changed

No meaningful buy/sell imbalance is currently visible in the one-year window.
Activity will update as new Forms 3/4/5 are filed.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Official SEC Source

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 10 Apr 2025.

Buys

Shares: 0

Insiders: 0

Sells

Shares: 0

Insiders: 0

Net

Shares: 0

Insiders: 0

Window (months)	Buy $	Sell $	Net $
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

PREFORMED LINE PRODUCTS CO executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Valuation	Report Date
Robert G. Ruhlman	Executive Chairman, Director, 10%+ Owner	$249,784,472	Mixed	13 Mar 2026
Randall M. Ruhlman	10%+ Owner	$112,883,824	Mixed	28 Dec 2022
Dennis F. McKenna	Ceo	$7,492,686	Mixed	10 Mar 2026
Andrew S. Klaus	Cfo	$5,636,471	Mixed	10 Mar 2026
Caroline Saylor Vaccariello	General Counsel&Corp Secretary	$5,529,006	Mixed	10 Mar 2026
William H. Haag III	V.P.-International Operations	$4,788,698	Mixed	10 Aug 2023
Jon Ryan Ruhlman	President, Director	$2,867,221	Mixed	10 Mar 2026
Michael E. Gibbons	Director	$2,760,799	Mixed	01 Jul 2025
John J. Olenik	VP-Research & Engineering	$2,218,245	Mixed	12 Mar 2026
Glen E. Corlett	Director	$2,124,458	Mixed	12 Mar 2026
Assaad A. Morcos	VP, US Manufacturing	$1,427,745	Mixed	10 Mar 2026
Timothy O'Shaughnessy	V.P. Human Resources	$1,279,810	Mixed	10 Mar 2026
John M. Hofstetter	Executive Vice President	$1,275,343	Mixed	10 Mar 2026
Maegan Adams Ruhlman Cross	Director	$1,264,960	Mixed	15 Dec 2025
R. Steven Kestner	Director	$1,250,323	Mixed	15 Dec 2025
Richard R. Gascoigne	Director	$802,384	Mixed	15 Dec 2025
C. Sunkle David	Director	$562,446	Mixed	10 Mar 2026
Matthew D. Frymier	Director	$440,130	Mixed	15 Dec 2025
William Koh	VP of Asia Pacific Region	$84,130	Mixed	04 Feb 2026
Katherine E. Wensink	10%+ Owner		Mixed	29 Aug 2024
Bernard L. Karr	10%+ Owner		Mixed	02 Jan 2022
Barbara P Ruhlman Revocable Trust dated 9/21/16	10%+ Owner		Mixed	14 Sep 2022
Third Restatement of Barbara P. Ruhlman Trust Agreement, dated November 20, 2008	10%+ Owner		Mixed	29 Aug 2024
Barbara P Ruhlman Irrevocable Trust dated 7/29/08	10%+ Owner		Mixed	29 Aug 2024

Top shareholders of PREFORMED LINE PRODUCTS CO (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Robert G. Ruhlman	3/4/5	Executive Chairman, Director, 10%+ Owner	18%	894,868	$249,784,472	—	13 Mar 2026	3/4/5
HighTower Advisors, LLC	13F	Company	20%	966,185	$199,720,101	—	31 Dec 2025	13F
Randall M. Ruhlman	3/4/5	10%+ Owner	— class O/S missing	866,072	$112,883,824	—	28 Dec 2022	3/4/5
DIMENSIONAL FUND ADVISORS LP	13F 13D/G	Company	6.3% from 13D/G	307,486	$63,561,699	—	31 Dec 2025	13F 13D/G
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	13F	Company	4.6%	223,014	$46,100,263	—	31 Dec 2025	13F
BlackRock, Inc.	13F	Company	4.1%	199,623	$41,264,069	—	31 Dec 2025	13F
VANGUARD GROUP INC	13F	Company	3.3%	160,864	$33,252,197	—	31 Dec 2025	13F
ROYCE & ASSOCIATES LP	13D/G 13F	Company	3.5%	172,086	$27,501,064	-$18,074,990	30 Jun 2025	13D/G 13F
FMR LLC	13F	Company	1.7%	83,894	$17,341,728	—	31 Dec 2025	13F
Invesco Ltd.	13F	Company	1.6%	79,299	$16,391,897	—	31 Dec 2025	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	1.5%	73,716	$15,237,834	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.5%	73,602	$15,216,499	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	1.2%	58,103	$12,010,471	—	31 Dec 2025	13F
Neuberger Berman Group LLC	13F	Company	0.92%	44,957	$9,293,061	—	31 Dec 2025	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.88%	42,816	$8,850,495	—	31 Dec 2025	13F
Grantham, Mayo, Van Otterloo & Co. LLC	13F	Company	0.77%	37,339	$7,718,345	—	31 Dec 2025	13F
Dennis F. McKenna	3/4/5	CEO	— mixed-class rows	26,843 mixed-class rows	$7,492,686	—	10 Mar 2026	3/4/5
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	0.72%	35,127	$7,261,102	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.71%	34,866	$7,207,151	—	31 Dec 2025	13F
PNC FINANCIAL SERVICES GROUP, INC.	13F	Company	0.65%	31,510	$6,513,432	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.6%	29,517	$6,101,460	—	31 Dec 2025	13F
Andrew S. Klaus	3/4/5	CFO	— mixed-class rows	20,193 mixed-class rows	$5,636,471	—	10 Mar 2026	3/4/5
Caroline Saylor Vaccariello	3/4/5	General Counsel&Corp Secretary	— mixed-class rows	19,808 mixed-class rows	$5,529,006	—	10 Mar 2026	3/4/5
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.54%	26,473	$5,472,234	—	31 Dec 2025	13F
CM Management, LLC	13F	Company	0.51%	25,000	$5,167,750	—	31 Dec 2025	13F
William H. Haag III	3/4/5	V.P.-International Operations	— class O/S missing	36,695	$4,788,698	—	10 Aug 2023	3/4/5
UBS Group AG	13F	Company	0.46%	22,629	$4,677,640	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	0.46%	22,470	$4,644,863	—	31 Dec 2025	13F
Informed Momentum Co LLC	13F	Company	0.46%	22,446	$4,639,813	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.4%	19,470	$4,024,644	—	31 Dec 2025	13F
Bank of New York Mellon Corp	13F	Company	0.39%	18,829	$3,892,063	—	31 Dec 2025	13F
LAZARD ASSET MANAGEMENT LLC	13F	Company	0.36%	17,668	$3,652,152	—	31 Dec 2025	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.36%	17,459	$3,608,950	—	31 Dec 2025	13F
FIRST TRUST ADVISORS LP	13F	Company	0.34%	16,399	$3,389,837	—	31 Dec 2025	13F
Congruence Capital, LLC	13F	Company	0.32%	15,414	$3,186,228	—	31 Dec 2025	13F
Jon Ryan Ruhlman	3/4/5	President, Director	— mixed-class rows	10,272 mixed-class rows	$2,867,221	—	10 Mar 2026	3/4/5
Man Group plc	13F	Company	0.28%	13,630	$2,817,457	—	31 Dec 2025	13F
Michael E. Gibbons	3/4/5	Director	0.36%	17,569	$2,760,799	—	01 Jul 2025	3/4/5
Susquehanna Portfolio Strategies, LLC	13F	Company	0.27%	13,256	$2,740,148	—	31 Dec 2025	13F
CITADEL ADVISORS LLC	13F	Company	0.25%	12,121	$2,505,532	—	31 Dec 2025	13F
Cardinal Capital Management	13F	Company	0.25%	12,104	$2,502,018	—	31 Dec 2025	13F
O'SHAUGHNESSY ASSET MANAGEMENT, LLC	13F	Company	0.22%	10,979	$2,269,469	—	31 Dec 2025	13F
John J. Olenik	3/4/5	VP-Research & Engineering	— mixed-class rows	7,947 mixed-class rows	$2,218,245	—	12 Mar 2026	3/4/5
PRINCIPAL FINANCIAL GROUP INC	13F	Company	0.22%	10,510	$2,172,522	—	31 Dec 2025	13F
Glen E. Corlett	3/4/5	Director	0.16%	7,611	$2,124,458	—	12 Mar 2026	3/4/5
Qube Research & Technologies Ltd	13F	Company	0.2%	9,881	$2,042,502	—	31 Dec 2025	13F
MARTINGALE ASSET MANAGEMENT L P	13F	Company	0.18%	8,859	$1,831,245	—	31 Dec 2025	13F
RITHOLTZ WEALTH MANAGEMENT	13F	Company	0.17%	8,446	$1,745,950	—	31 Dec 2025	13F
WealthBridge Capital Management, LLC	13F	Company	0.16%	8,011	$1,655,954	—	31 Dec 2025	13F
Cambridge Investment Research Advisors, Inc.	13F	Company	0.16%	7,905	$1,634,000	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for PREFORMED LINE PRODUCTS CO

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Shares	Shares Owned	Date	Ownership
Robert G. Ruhlman	PLPC	Common shares, $2 par value	Disposed to Issuer	-0.87%	-2,500	285,673	13 Mar 2026	Direct
Glen E. Corlett	PLPC	Common shares, $2 par value	Disposed to Issuer	-6.65%	-400	5,611	12 Mar 2026	Direct
John J. Olenik	PLPC	Common shares, $2 par value	Disposed to Issuer	-100%	-752	0	12 Mar 2026	by 401(k) plan
Assaad A. Morcos	PLPC	Common Shares, $2 par value per share	Disposed to Issuer	-100%	-1,750	0	10 Mar 2026	Direct
Assaad A. Morcos	PLPC	Common Shares, $2 par value per share	Options Exercise		1,750	1,750	10 Mar 2026	Direct
Assaad A. Morcos	PLPC	Employee stock option (right to buy)	Options Exercise	-26.9%	-1,750	4,750	10 Mar 2026	Direct
C. Sunkle David	PLPC	Common shares, $2 par value	Disposed to Issuer	-49.9%	-1,600	1,607	10 Mar 2026	Direct
Timothy O'Shaughnessy	PLPC	Common shares, $2 par value	Disposed to Issuer	-23.7%	-1,244	4,000	10 Mar 2026	Direct
Caroline Saylor Vaccariello	PLPC	Common shares, $2 par value	Disposed to Issuer	-44.8%	-1,547	1,908	10 Mar 2026	Direct
Jon Ryan Ruhlman	PLPC	Common shares, $2 par value	Disposed to Issuer	-34.6%	-2,000	3,784	10 Mar 2026	Direct
John M. Hofstetter	PLPC	Common shares, $2 par value	Disposed to Issuer	-63.5%	-6,000	3,446	10 Mar 2026	Direct
Dennis F. McKenna	PLPC	Common shares, $2 par value	Disposed to Issuer	-100%	-7,887	0	10 Mar 2026	Direct
Andrew S. Klaus	PLPC	Common shares, $2 par value	Disposed to Issuer	-14%	-2,365	14,553	10 Mar 2026	Direct
William Koh	PLPC	Restricted stock units	Award		407	407	04 Feb 2026	Direct
Assaad A. Morcos	PLPC	Restricted stock units	Award		407	407	04 Feb 2026	Direct
Caroline Saylor Vaccariello	PLPC	Common shares, $2 par value	Tax liability	-27%	-1,278	3,455	04 Feb 2026	Direct
Caroline Saylor Vaccariello	PLPC	Common shares, $2 par value	Award	47.2%	1,517	4,733	04 Feb 2026	Direct
Caroline Saylor Vaccariello	PLPC	Restricted stock units	Award		564	564	04 Feb 2026	Direct
John M. Hofstetter	PLPC	Common shares, $2 par value	Tax liability	-13.1%	-1,424	9,446	04 Feb 2026	Direct
John M. Hofstetter	PLPC	Common shares, $2 par value	Award	18.5%	1,696	10,870	04 Feb 2026	Direct
John M. Hofstetter	PLPC	Restricted stock units	Award		591	591	04 Feb 2026	Direct
John J. Olenik	PLPC	Common shares, $2 par value	Tax liability	-11.6%	-987	7,506	04 Feb 2026	Direct
John J. Olenik	PLPC	Common shares, $2 par value	Award	15.8%	1,160	8,493	04 Feb 2026	Direct
John J. Olenik	PLPC	Restricted stock units	Award		441	441	04 Feb 2026	Direct
Timothy O'Shaughnessy	PLPC	Common shares, $2 par value	Tax liability	-16.6%	-1,041	5,244	04 Feb 2026	Direct
Timothy O'Shaughnessy	PLPC	Common shares, $2 par value	Award	24.3%	1,227	6,285	04 Feb 2026	Direct
Timothy O'Shaughnessy	PLPC	Restricted stock units	Award		493	493	04 Feb 2026	Direct
Andrew S. Klaus	PLPC	Common shares, $2 par value	Tax liability	-8.12%	-1,496	16,918	04 Feb 2026	Direct
Andrew S. Klaus	PLPC	Common shares, $2 par value	Award	10.7%	1,785	18,414	04 Feb 2026	Direct
Andrew S. Klaus	PLPC	Restricted stock units	Award		693	693	04 Feb 2026	Direct
Dennis F. McKenna	PLPC	Common shares, $2 par value	Tax liability	-22%	-2,223	7,887	04 Feb 2026	Direct
Dennis F. McKenna	PLPC	Common shares, $2 par value	Award	36%	2,677	10,110	04 Feb 2026	Direct
Robert G. Ruhlman	PLPC	Common shares, $2 par value	Tax liability	-2.01%	-5,924	288,173	04 Feb 2026	Direct
Robert G. Ruhlman	PLPC	Common shares, $2 par value	Award	4.77%	13,386	294,097	04 Feb 2026	Direct
Jon Ryan Ruhlman	PLPC	Common shares, $2 par value	Tax liability	-20.5%	-1,494	5,784	04 Feb 2026	Direct
Jon Ryan Ruhlman	PLPC	Common shares, $2 par value	Award	32.5%	1,785	7,278	04 Feb 2026	Direct
Timothy O'Shaughnessy	PLPC	Common shares, $2 par value	Options Exercise	26.4%	1,058	5,058	31 Dec 2025	Direct
Timothy O'Shaughnessy	PLPC	Restricted stock units	Options Exercise	-100%	-1,058	0	31 Dec 2025	Direct
John J. Olenik	PLPC	Common shares, $2 par value	Options Exercise	15.8%	1,000	7,333	31 Dec 2025	Direct
John J. Olenik	PLPC	Restricted stock units	Options Exercise	-100%	-1,000	0	31 Dec 2025	Direct
Caroline Saylor Vaccariello	PLPC	Common shares, $2 par value	Options Exercise	68.6%	1,308	3,216	31 Dec 2025	Direct
Caroline Saylor Vaccariello	PLPC	Restricted stock units	Options Exercise	-100%	-1,308	0	31 Dec 2025	Direct
Andrew S. Klaus	PLPC	Common shares, $2 par value	Options Exercise	10.2%	1,539	16,629	31 Dec 2025	Direct
Andrew S. Klaus	PLPC	Restricted stock units	Options Exercise	-100%	-1,539	0	31 Dec 2025	Direct
Dennis F. McKenna	PLPC	Common shares, $2 par value	Options Exercise	45%	2,308	7,433	31 Dec 2025	Direct
Dennis F. McKenna	PLPC	Restricted stock units	Options Exercise	-100%	-2,308	0	31 Dec 2025	Direct
John M. Hofstetter	PLPC	Common shares, $2 par value	Options Exercise	19%	1,462	9,174	31 Dec 2025	Direct
John M. Hofstetter	PLPC	Restricted stock units	Options Exercise	-100%	-1,462	0	31 Dec 2025	Direct
Jon Ryan Ruhlman	PLPC	Common shares, $2 par value	Options Exercise	38.9%	1,539	5,493	31 Dec 2025	Direct
Jon Ryan Ruhlman	PLPC	Restricted stock units	Options Exercise	-100%	-1,539	0	31 Dec 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.